Multiply : 5x2 – 8xy + 6y2 – 3by – 3xy

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asked May 16 in Class VIII Maths by aditya23 (-1,721 points)

Multiply :

(i) 5x2 – 8xy + 6y2 – 3 by – 3xy

(ii) 3 – (2/3)xy + (5/7)xy2 – (16/21)x2 y by – 21x2y2

(iii) 6x3 – 5x + 10 by 4 – 3x2

(iv) 2y – 4y3 + 6y5 by y2 + y – 3

(v) 5p2 + 25pq + 4q2 by 2p2 – 2pq + 3q2

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1 Answer

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answered May 16 by muskan15 (-3,360 points)

(i) 5x2 – 8xy + 6y2 – 3 × (-3xy)

= 15x3y3 + 24x2y2 – 18xy3 + 9xy

(ii) 3 – (2/3) xy + (5/7)xy2 – (16/21)x2y

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